Type 1 (Central stock room)

Groszy overprints - Central stock room in Warsaw - Zentralversorgungslager Warschau - Centralna składnica zaopatrzenia w Warszawy

Groszy overprint Type 1 on Fischer 475 / Michel 523

3,600,000 Bolesław Bierut 15 Złoty stamps, issued 14 October 1948, were overprinted by prisoners of a Warsaw prison.